Now, if your looking for a laser/light combo. Those are gonna set you back a good bit, and I wouldn't recommend going cheap on anything that involves your sighting. And for those, I wouldn't recommend them at all, its all too easy to rely on them after a while. It's human nature, but if I were to recommend any. The SIG, and Streamlite would be the first place I'd search.

Of course you could always go with what has been mentioned above, in a detached tac light. But that requires an additional amount of training too. Unless that is naturally how you train. Which seems rather unlikely.